GS4 4-8-4 locomotive - DCC sound value equipped - Southern Pacific daylight #4449 - RAILFAN version (Southern Pacific lines) - HO-Scale. The streamlined, powerful SP GS4 4-8-4 steam locomotives were the choice of high-speed passenger service in the Southwest until they were superseded by diesels in the late 1950S. This 4-8-4 now includes our sound value SoundTraxx steam package with authentic prototypical chuff, short and long whistles, bell, air pump, steam release, and blower—all in 16-bit polyphonic sound. Features include: DCC sound-equipped, dual-mode NMRA-compliant decoder, precision motor, operating headlight, separately applied metal parts. See-through frame, RP25 wheels, E-Z Mate mark II couplers